Lloyd’s Hygrodeik, manufactured by Tycos, Rochester, New York. A hygrodeik measures relative humidity, with wet and dry thermometers, and an index arm indicating relative humidity on a scale. Lloyd’s Hygrodeik was patented in 1902. This instrument is approximately 10 1/8″ tall by 7 7/8″ wide. Both thermometers work and are in tact. I have not tested it. You may return an item within 14 days, IF THE ITEM WAS NOT AS DESCRIBED IN THE LISTING. Check out MY STORE. For other great items! The item “Antique Complete Tycos Lloyd’s Hygrodeik Rochester, NY” is in sale since Sunday, June 28, 2015. This item is in the category “Antiques\Science & Medicine (Pre-1930)\Scientific Instruments\Barometers”. The seller is “auction-discoveries” and is located in Perry, Ohio. This item can be shipped to United States, to Canada, to United Kingdom, to Mexico, to Australia.